Agilent / Keysight 85640A Tracking Generator, 300 kHz to 2.9 GHz

The Agilent/Keysight 85640A is a MIL-rugged, portable tracking generator engineered to extend the measurement capabilities of the 8560 Series spectrum analyzers. Operating from 300 kHz to 2.9 GHz, it enables scalar and spectrum analysis of RF components and subsystems, delivering gain, frequency response, compression, flatness, and return loss measurements. The instrument also characterizes harmonic and inter-modulation distortion, along with spurious products.

Technical Specifications

• Frequency Range: 300 kHz to 2.9 GHz


• Output Power: -80 dBm to 0 dBm (70 dB step attenuator with >10 dB vernier range)


• Output Flatness: ±2.0 dB (referenced to 300 MHz at 10 dB attenuation)


• Dynamic Range: 95 dB (300 kHz–1 MHz), 115 dB (1 MHz–2.7 GHz), 110 dB (2.7 GHz–2.9 GHz); 300 Hz minimum RBW; 100 Hz with compatible analyzers


• Harmonic Spurs: <-25 dBc at -10 dBm, 10 dB attenuation


• Non-Harmonic Spurs: <-27 dBc (300 kHz–2.0 GHz), <-23 dBc (2.0 GHz–2.9 GHz)


• LO Feedthrough: 2.9 GHz)


• Output Return Loss: 10 dB (0 dB attenuation), 17 dB nominal (10 dB attenuation)


• Tracking Drift: 300 Hz/hour nominal (after 30 min warm-up)


• Warm-up Time: 5 minutes


• Power Requirements: 110, 120, 220, or 240 V (±10%), 47–66 Hz; 130 VA maximum, 35 W


• RF Output: Type N female, 50 ohm nominal


• Operating Temperature: -10°C to +50°C


• Storage Temperature: -62°C to +85°C


• Weight: 8.4 kg (18.5 lbs)


• Altitude: Up to 15,000 ft


• Mechanical: Compliant with MIL-STD-461B Part 4; 30 g half-sine shock (11 ms); 8-inch transit drop rated

Key Features

• Front-panel tracking control minimizes tracking error


• Continuously variable output power with dual-range attenuator


• Support for 300 Hz RBW; 100 Hz with 8561A, 8562A/B models


• Auxiliary inputs: 300 MHz input (BNC), LO input (SMA), blanking (BNC rear), external ALC (BNC rear)

Compatibility & Integration Designed for integration with HP/Agilent 8560A/E, 8561A/B/E, and 8562A/B spectrum analyzers.